Toyota ZZT230 series Repair Manual page 328

)
Check
and replace
Check for open and short In harness and connector in IGT signal circuit between
4
ECM and Ignition coil with Igniter (See page IN-30).
Check voltage between terminals IGTI
5
)
IGT
IGF
)
DIAGNOSTICS
ECM (See page IN-30).
G
PREPARATION:
Remove the ECM cover.
CHECK:
Measure vol t age between terminal s
nectar and body ground when engine is cranked.
OK:
Reference: INSPECTION USING OSCILLOSCOPE
During cranking or idling, check waveform between terminal s
5 VI
Division
IGT1
HINT:
Correct waveform appears as sohwn, with rectangle waves.
GND
GND
G
-
ENGINE
Repair or replace harness or connector.
-
4 of ECM connector and body ground.
Voltage: More than 0.1 V and less than 4.5 V
-
and E of the ECM connector.
1
4
Check and replace ECM (See page IN-30).
01-117
-
of the ECM con·
4
IGT1